2. Pay attention to the posture of the head. Some people's necks lean forward because of incorrect sitting posture, and natural head leaning forward will affect the efficiency of breathing. When running, you can't lean forward, lean back or bow your head. Look up and look straight ahead.
3. Swing your arms. Swinging hands and arms is a common wrong running posture, which will greatly waste physical strength. Put your arms naturally on both sides of your chest and swing them left and right. Don't swing your arms out too much, and don't clamp your body too much, otherwise it will easily cause underarm or chest abrasions.
4. When running with core strength, the upper body will swing left and right. We should consciously use the core strength and control the swing range, so that the hips will be more stable and avoid the back pain caused by large swing.